From the present day schools of fiqh, and furthermore the ones (school of fiqh) that are not in existance.
a) This was thought has came about what is the understanding of making the Hijrah? b)How can it suffice if the muslim country hasn't opened the door for 'foreigners' to move to in? c) Even with a person from another country is on a working visa and has a residency can this suffice as a legitimate 'migration' from Dar al Kufr to Dar al Islam?!